Update log-file.c

test whether tx_ud is NULL
Fix compile-time error on old kernels and ethtool.h
ethtool: add missing include necessary for CentOS5
htp: init memuse atomics

In case of the spinlocked fallback code the lock was uninitialized.
Profiling: fix compilation on CentOS5

Bug #1207
Open 2.1 development in the master branch.
autotools: enable silent mode

Add check to make sure that if the functionality isn't available, we
don't error out.
Update version number to 2.1dev